/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-tiling/pnr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:47:27,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:47:27,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:47:27,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:47:27,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:47:27,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:47:27,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:47:27,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:47:27,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:47:27,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:47:27,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:47:27,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:47:27,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:47:27,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:47:27,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:47:27,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:47:27,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:47:27,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:47:27,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:47:27,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:47:27,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:47:27,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:47:27,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:47:27,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:47:27,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:47:27,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:47:27,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:47:27,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:47:27,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:47:27,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:47:27,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:47:27,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:47:27,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:47:27,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:47:27,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:47:27,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:47:27,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:47:27,251 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:47:27,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:47:27,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:47:27,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:47:27,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:47:27,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:47:27,253 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:47:27,253 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:47:27,253 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:47:27,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:47:27,254 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:47:27,254 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:47:27,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:47:27,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:47:27,255 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:47:27,255 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:47:27,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:47:27,255 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:47:27,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:47:27,256 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:47:27,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:47:27,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:47:27,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:47:27,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:47:27,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:47:27,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:47:27,257 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:47:27,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:47:27,257 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:47:27,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:47:27,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:47:27,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:47:27,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:47:27,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:47:27,258 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:47:27,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:47:27,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:47:27,258 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:47:27,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:47:27,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:47:27,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:47:27,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:47:27,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:47:27,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:47:27,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:47:27,531 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:47:27,531 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:47:27,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr5.c [2023-04-01 02:47:28,653 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:47:28,852 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:47:28,853 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c [2023-04-01 02:47:28,859 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/760d6c45d/b37f684451494b54b3c4f54f3c352e8d/FLAG89653fe2a [2023-04-01 02:47:28,871 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/760d6c45d/b37f684451494b54b3c4f54f3c352e8d [2023-04-01 02:47:28,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:47:28,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:47:28,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:47:28,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:47:28,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:47:28,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:47:28" (1/1) ... [2023-04-01 02:47:28,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17dc36e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:28, skipping insertion in model container [2023-04-01 02:47:28,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:47:28" (1/1) ... [2023-04-01 02:47:28,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:47:28,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:47:29,020 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2023-04-01 02:47:29,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:47:29,056 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:47:29,067 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2023-04-01 02:47:29,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:47:29,091 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:47:29,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29 WrapperNode [2023-04-01 02:47:29,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:47:29,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:47:29,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:47:29,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:47:29,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29" (1/1) ... [2023-04-01 02:47:29,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29" (1/1) ... [2023-04-01 02:47:29,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29" (1/1) ... [2023-04-01 02:47:29,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29" (1/1) ... [2023-04-01 02:47:29,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29" (1/1) ... [2023-04-01 02:47:29,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29" (1/1) ... [2023-04-01 02:47:29,140 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29" (1/1) ... [2023-04-01 02:47:29,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29" (1/1) ... [2023-04-01 02:47:29,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:47:29,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:47:29,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:47:29,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:47:29,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29" (1/1) ... [2023-04-01 02:47:29,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:47:29,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:29,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:47:29,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:47:29,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:47:29,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:47:29,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:47:29,215 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:47:29,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:47:29,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2023-04-01 02:47:29,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:47:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:47:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:47:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:47:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:47:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:47:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:47:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:47:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 02:47:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2023-04-01 02:47:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:47:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 02:47:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:47:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:47:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:47:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:47:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:47:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:47:29,291 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:47:29,293 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:47:29,591 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:47:29,699 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:47:29,700 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 02:47:29,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:47:29 BoogieIcfgContainer [2023-04-01 02:47:29,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:47:29,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:47:29,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:47:29,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:47:29,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:47:28" (1/3) ... [2023-04-01 02:47:29,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4468e365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:47:29, skipping insertion in model container [2023-04-01 02:47:29,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:29" (2/3) ... [2023-04-01 02:47:29,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4468e365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:47:29, skipping insertion in model container [2023-04-01 02:47:29,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:47:29" (3/3) ... [2023-04-01 02:47:29,721 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr5.c [2023-04-01 02:47:29,733 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:47:29,733 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:47:29,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:47:29,774 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@65474119, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:47:29,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:47:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 02:47:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 02:47:29,783 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:29,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:47:29,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:29,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2114998606, now seen corresponding path program 1 times [2023-04-01 02:47:29,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:29,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668216176] [2023-04-01 02:47:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:29,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:47:30,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:30,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668216176] [2023-04-01 02:47:30,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668216176] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:47:30,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:47:30,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 02:47:30,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718603393] [2023-04-01 02:47:30,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:47:30,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 02:47:30,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:47:30,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 02:47:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:47:30,384 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:47:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:47:30,529 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2023-04-01 02:47:30,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 02:47:30,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 02:47:30,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:47:30,537 INFO L225 Difference]: With dead ends: 72 [2023-04-01 02:47:30,537 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 02:47:30,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:47:30,545 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:47:30,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 56 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:47:30,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 02:47:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2023-04-01 02:47:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 02:47:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-01 02:47:30,600 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 17 [2023-04-01 02:47:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:47:30,601 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-01 02:47:30,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:47:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-01 02:47:30,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 02:47:30,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:30,603 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:47:30,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:47:30,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:30,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:30,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1380864962, now seen corresponding path program 1 times [2023-04-01 02:47:30,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:30,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945850298] [2023-04-01 02:47:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:30,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 02:47:33,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:33,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945850298] [2023-04-01 02:47:33,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945850298] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:47:33,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548254931] [2023-04-01 02:47:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:33,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:33,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:33,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:47:33,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:47:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:33,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 59 conjunts are in the unsatisfiable core [2023-04-01 02:47:33,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:47:33,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:47:33,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:47:33,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-04-01 02:47:33,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 02:47:33,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2023-04-01 02:47:33,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-04-01 02:47:33,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:33,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 75 [2023-04-01 02:47:33,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2023-04-01 02:47:33,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:33,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 93 [2023-04-01 02:47:33,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2023-04-01 02:47:33,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2023-04-01 02:47:33,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-04-01 02:47:33,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:33,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 93 [2023-04-01 02:47:33,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2023-04-01 02:47:33,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-04-01 02:47:33,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2023-04-01 02:47:33,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:33,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 16 [2023-04-01 02:47:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 02:47:34,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:47:34,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:34,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2023-04-01 02:47:34,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:34,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-04-01 02:47:34,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:34,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 30 [2023-04-01 02:47:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 02:47:34,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548254931] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:47:34,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984792085] [2023-04-01 02:47:34,528 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-01 02:47:34,528 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:47:34,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:47:34,534 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:47:34,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:47:34,601 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:47:37,109 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-04-01 02:47:37,122 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 40 for LOIs [2023-04-01 02:47:37,127 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 23 for LOIs [2023-04-01 02:47:37,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:47:37,136 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:47:39,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '450#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (exists ((v_main_~a~0.base_BEFORE_CALL_44 Int)) (and (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_44) 0) 0) (<= (+ v_main_~a~0.base_BEFORE_CALL_44 1) |#StackHeapBarrier|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:47:39,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:47:39,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:47:39,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 12] total 31 [2023-04-01 02:47:39,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325825184] [2023-04-01 02:47:39,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:47:39,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 02:47:39,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:47:39,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 02:47:39,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=3064, Unknown=17, NotChecked=0, Total=3422 [2023-04-01 02:47:39,856 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 31 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 14 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2023-04-01 02:47:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:47:40,838 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2023-04-01 02:47:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 02:47:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 14 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) Word has length 38 [2023-04-01 02:47:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:47:40,840 INFO L225 Difference]: With dead ends: 70 [2023-04-01 02:47:40,840 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 02:47:40,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=616, Invalid=4769, Unknown=17, NotChecked=0, Total=5402 [2023-04-01 02:47:40,843 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 02:47:40,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 179 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 02:47:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 02:47:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2023-04-01 02:47:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 02:47:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2023-04-01 02:47:40,857 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 38 [2023-04-01 02:47:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:47:40,858 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2023-04-01 02:47:40,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 14 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2023-04-01 02:47:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2023-04-01 02:47:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 02:47:40,860 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:40,860 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:47:40,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 02:47:41,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:41,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:41,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2052054259, now seen corresponding path program 1 times [2023-04-01 02:47:41,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:41,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566207659] [2023-04-01 02:47:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:41,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 02:47:41,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566207659] [2023-04-01 02:47:41,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566207659] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:47:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345754693] [2023-04-01 02:47:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:41,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:41,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:41,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:47:41,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:47:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:41,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 02:47:41,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:47:41,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 39 [2023-04-01 02:47:42,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-04-01 02:47:42,035 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-01 02:47:42,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-04-01 02:47:42,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 02:47:42,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-04-01 02:47:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 02:47:42,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:47:42,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:42,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2023-04-01 02:47:42,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:42,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 36 [2023-04-01 02:47:42,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:42,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 38 [2023-04-01 02:47:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 02:47:42,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345754693] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:47:42,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601365214] [2023-04-01 02:47:42,636 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-01 02:47:42,637 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:47:42,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:47:42,637 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:47:42,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:47:42,668 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:47:44,924 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 59 for LOIs [2023-04-01 02:47:44,989 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 40 for LOIs [2023-04-01 02:47:44,994 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 23 for LOIs [2023-04-01 02:47:44,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:47:45,013 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:47:48,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1071#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:47:48,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:47:48,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:47:48,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 15] total 37 [2023-04-01 02:47:48,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130435993] [2023-04-01 02:47:48,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:47:48,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 02:47:48,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:47:48,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 02:47:48,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3904, Unknown=17, NotChecked=0, Total=4290 [2023-04-01 02:47:48,071 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 37 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 20 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 19 states have call predecessors, (28), 18 states have call successors, (28) [2023-04-01 02:47:49,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:47:49,804 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2023-04-01 02:47:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 02:47:49,809 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 20 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 19 states have call predecessors, (28), 18 states have call successors, (28) Word has length 59 [2023-04-01 02:47:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:47:49,815 INFO L225 Difference]: With dead ends: 123 [2023-04-01 02:47:49,815 INFO L226 Difference]: Without dead ends: 121 [2023-04-01 02:47:49,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2892 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=842, Invalid=7151, Unknown=17, NotChecked=0, Total=8010 [2023-04-01 02:47:49,820 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 288 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 02:47:49,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 408 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 02:47:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-01 02:47:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2023-04-01 02:47:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 02:47:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2023-04-01 02:47:49,855 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 59 [2023-04-01 02:47:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:47:49,855 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2023-04-01 02:47:49,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 20 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 19 states have call predecessors, (28), 18 states have call successors, (28) [2023-04-01 02:47:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2023-04-01 02:47:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 02:47:49,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:49,857 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:47:49,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:47:50,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 02:47:50,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:50,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:50,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1428831870, now seen corresponding path program 2 times [2023-04-01 02:47:50,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:50,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151228391] [2023-04-01 02:47:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:50,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 02:47:50,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:50,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151228391] [2023-04-01 02:47:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151228391] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:47:50,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160512332] [2023-04-01 02:47:50,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:47:50,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:50,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:50,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:47:50,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:47:50,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 02:47:50,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:47:50,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 02:47:50,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:47:50,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2023-04-01 02:47:50,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 02:48:23,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-04-01 02:48:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 02:48:23,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:23,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:23,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2023-04-01 02:48:23,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 39 [2023-04-01 02:48:23,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:23,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 36 [2023-04-01 02:48:23,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:23,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 38 [2023-04-01 02:48:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 02:48:23,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160512332] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:23,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405665013] [2023-04-01 02:48:23,496 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-01 02:48:23,496 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:23,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:23,497 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:23,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:23,525 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:25,431 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 59 for LOIs [2023-04-01 02:48:25,486 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 40 for LOIs [2023-04-01 02:48:25,490 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 23 for LOIs [2023-04-01 02:48:25,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:25,503 INFO L180 IcfgInterpreter]: Interpretation finished